Improvement in machines for forming carriage-clips



3Sheets-$heet1f F. B. PRINDLE. MACHINES FUR-FORMING CARRIAGE CLIPS.No.176.048. Patented April 11, 1876.

3 Sheets-Sheet 2.-

F. B. PRINDLE. MACHINES FOR FORMING CARRIAGE CLIPS. N 0.176,048. IPatented Aprill1,1876.

WI N E15SE5= INVENTUFP N.PETERS FHDTO-LITHOQRAPMER, WASHINGTON O C3Sheets-Si1eet3. F. B. PRINDLE.

MACHINES FOR FORMING CARRIAGE CLIPS No. 176,048. Patented April 11,1876.

IM/EN U yT'QM OMQQZQ ",FEYERS. PHOTO-LITNDGRAPHER. WASHlNGTON, D C.

i i I I 'r I UNITED STATES PATENT OFFICE.

FRANKLIN B. PRINDLE, OF SOUTHINGTON, CONNECTICUT.

IMPROVEMENT IN MACHINES FOR FORMING CARRIAGE-CLIPS.

Specification forming part of Letters Patent No. 176,048, dated April11, 1876; application filed October 15, 1875.

To all whom it may concern:

Be it known that 1, FRANKLIN B. PRINDLE, of Southington, in the countyof Hartford and in the State of Connecticut, have invented certain newand useful Improvements in Mechanism for Forming Carriage-Clips; and dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making a part of this specification, in which- Figure l is a plan viewof the upper side of my machine. Figs. 2 and 3 are elevations ofopposite sides of the same. Figs. at and 5 are like views, enlarged, ofthe front end of said machine, showing the swaging mechanism. Figs. 6and 7 are vertical sections upon line a: w of Fig. 1, showing,respectively, the cutting and holding mechanism before and during operation. Fig.8 is a like view of the sliding carriage upon line 00 w ofFig. 2, and shows the pawl employed for rotating the die-head and Fig. 9is a horizontal section upon line 2 z of said Fig. 2, showing the meansemployed for operating said pawl.

Letters of like name and kind refer to like parts in each of thefigures,

The design of my invention is to enable carriage-clips to be produced ofa better quality, and with less waste of metal, than has heretofore beenpracticable by machinery; and to this end it consists, principally, inan improved method of forming clips, by confining the ends of a blank inlongitudinal position, and, by means of a roller, forcing the surplusmetal in each direction from its longitudinal center lengthwise tothejuuction of its flattened and round portions, substantially as andfor the purpose hereinafter specified. it consists, further, in themechanism employed for forming the clip, substantially as is hereinaftershown. It consists, further, in the means employed for severing blanksfrom a rod of iron, substantially as and for the purpose hereinafter setforth. It consists, further, in the means employed for confining theblank in position upon the die, substantially as is hereinafter shownand described. It consists, finally, in the means employed for giving tothe many-faced die an intermittent rotary motion, substantially as andfor the purpose hereinafter shown.

I In the annexed drawings, A represents a head, which isarranged to movelongitudinally within suitable horizontal ways I) and b, and has pivotedwithin its upper side a block, 0, that has upon its periphery a seriesof faces, 0, c, and 0, each of which contains depressions c, 0, and c,that correspond in size, shape, and relative position to the likefeatures of the round portions of a carriage-clip. Within the frame B ofthe machine, near its longitudinal center, is pivoted a lever, D, of theshape shown in Fig. 2, which is capable of being moved in a verticalplane upon its pivotal bearing, and at its forward end is provided witha roller, E, that may be caused to bear upon the uppermost face 0 of thedieblock 0 as the latter is moved longitudinally beneath the same.

It is intended that a blank consisting of a round piece of iron,corresponding in transverse size to the threaded portions of a tinishedclip, shall be properly heated and placed upon the upper die 0, with itsends closely confined in place, and that as the dieblock 0 movesrearward, the roller E shall be caused to bear heavily upon said blanknear its longitudinal center, and flatten the same to the point wherethe flattened and round portions of that end of the clip meet, and thatupon the return movement of said die-block said roller shall perform thesame operation upon the remaining half of said blank, by

which operation, as the latter is prevented.

from being lengthened, the surplus metal is carried by said roller tothe points where most needed-via, the said junctions of the round andflattened portionsand forms full and perfect shoulders at such points.

The reciprocating movement of the block A is produced by means of arock-shaft, F, which is journaled within the lower side of the frame B,and is provided with two vertical arms, f and f, the first of which,working within a central longitudinal opening in said frame, isconnected with the rear end of the head B by means of a bar, G, that ispivoted to and extends between said parts, while said second arm f,placed outside of said frame, is connected with a crank-arm, h, of arevolving shaft, H, by means of a connecting-rod, I, the arrangementdescribed being such as to cause the revolution of said shaft tocommunicate to said rock-shaft an oscillating motion, which, inturn,'gives a reciprocating motion to said head. The shaft His journaledwithin the rear end of the frame B, directly beneath the rear end of thelever D, and at such point is provided with a cam, 71/, which bearsagainst said lever end, and has such size, shape, and position,circumferentially, upon said shaft, with relation to the arm h, as giveto said lever the desired motion, befoi e described.

To effect such revolution of the die-block at the termination of eachoutward stroke as will bring a new die upward, the followingdescribedmechanism isemployed: Upon the rear end of the block 0 is provided aratchetwheel, 0, and upon the pivotal bearing of said head, outside ofsaid ratchet, is loosely journaled a disk, K, that has the form, in rearelevation, seen in Fig. 8,01ie side being extended sufficiently toenable a pawl. 76, to be pivoted thereto, so as to engage wit-l1 saidratchetavheel, while from the lower edge of said disk extends downwardan arm, 7t, that is contained within the forked end 1 of a lever, L,which latter is pivoted within a suitable recess in the lower portion ofsaid head, and is capable of a horizontal movement therein.

As seen in Fig. 9, the lever L has nearly the shape of a right angle,with one of its arms, l, connected, as described, whilcits other shorterarm, 6, projects beyond the side of the head A, and, as the latter moveswithin its bearings, engages with two stops, M and M, which are attachedto the frame B in such positions as to throw said lever, just before thelimit of motion, in each direction of said head, and thereby operate thepawl-disk and its pawl, and partially rotate the die block at eachoperation.

It is designed that the blanks shall be cut from a bar of metal justbefore being operated upon, which result is accomplished by thefollowing-described means: The die-block U hasjust the length of thedesired blank, and

to one side of the head A is journaled a shaft, N, which has twocutters, n and n, that extend radially outward, and by a partialrevolution of saidshaft may be caused to pass sufficiently near to theends of said block A to shear off a metal rod placed upon the latterbeneath said cutters.

A11 arm, a, secured to and extending downward from the shaft N, engageswith an inclined surface, 0, upon the contiguous portion of the f2tl116B, as the head A nears the limit of its inward motion, and, by giving toI said shaft a partial revolution at such instant,

causes its cutters to operate, as described.

The blank thus out from the bar is carried upward and forward by thenext partial revolution of the dieblock to a position for re ceiving theimpact of the swaging-roller, in which position it is held-by means oftwo arms, 19 and 19, that are attached to and extend radially outwardfrom a' shaft, P, and embrace the ends and the upper side at sair endsof said blank, and confine the same firmly upon its die.

The holding-shaft P is operated, as in case of the cutting-shaft, bymeans of an arm,p, which extends downward from the 'former, and, as thehead moves rearward, engages at its lower end with, and is moved outwardby, an inclined surface, Q, formed upon the contiguous portion of theframe B.

Having thus fully set forth the nature and merits of my invention, whatI claim as new 1s- 1. An improved method of forming clips by confiningthe ends of a blank in longitudinal position, and by means of a rollerforcing the surplus metal in each direction from its longitudinal centerlengthwise to the junction of its flattened and round portions,substantial- 1y as and for the purpose specified.

2. The die-blocks O c o, constructed as shown, and arranged toreciprocate lengthwise in a horizontal direction, in combination withthe lever D and roller E, which have such vertical motion as to causesaid roller to impinge upon said die-block, substantially as and for thepurpose shown.

3. In combination with the many-faced dieblock 0, pivoted within thehead A, and arranged to reciprocate longitudinally with the same, theshaft N, journaled upon said head, provided with the cutters n and 'nand arm a, and caused to oscillate within its bearings by contact ofsaid arm with the inclined and relatively-fixed surface 0, substantiallyas and for the purpose set forth.

4. In combination with the pivoted manyfaced die-block U, the shaft P,provided with the holders 1) and p and arm 10, and caused to'oscillatewithin its bearings by contact of said'arm with the inclined andrelatively-fixed surface Q, substantially as and for the purpose shownand described.

5. In combination with the pivoted die block 0, provided with theratchet-wheel G, and arranged to reciprocate with the head A, the diskK, provided with the pawl 70 and arm k, the lever L l l, and the stops Mand M, all arranged to operate in the manner and for the purposesubstantially as specified.

In testimony that I claim the foregoing I have hereunto set my hand this14th day of April, 1875.

FRANKLIN B. PRINDLE.

Witnesses:

GEO. S. PRINDLE, WILLIAM FrrcH.

